Battery-Powered deposition system and process for making reflective coatings

Inactive Publication Date: 2018-08-02
SHEIKH DAVID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0065]When the deposition unit is energized, it is important to control the rate of energy supplied to the filament. This allows the deposition material contained on the filament, to be warmed to the melting point, and then heated more rapidly by turning up the current to the filament. This process prevents the filament from being over-energized when it is cold and the resistance in the tungsten filament is low. Applicant uses a programmable circuit to accomplish the controlled release of ele

Problems solved by technology

However, filament evaporation severely limits the choices of materials that may be evaporated.
This limits the protective coating recipes that may be devised to prevent degradation of the silver reflector over time due to t

Method used

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  • Battery-Powered deposition system and process for making reflective coatings
  • Battery-Powered deposition system and process for making reflective coatings
  • Battery-Powered deposition system and process for making reflective coatings

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Embodiment Construction

[0071]FIG. 1 is a sketch of a single battery-powered deposition (BPD) unit. The unit 1 includes a filament 2 and circuit board 4 and two batteries 6 both contained in leak-proof tube 8. FIGS. 2A and 2B show individual BPD units 1 arranged in a hexagonal pattern 10 In these two drawings, a Cassegrain-Telescope with a primary mirror 12 and a secondary mirror 14 integrated with the battery-powered coating system. In this integration concept, a disc-shaped array of evaporators swings in front of the mirror for coating, and then swings out of the way for observations as shown in FIGS. 2A and 2B. More complicated telescopes with additional small mirror bounces and gratings can be accommodated with single BPD units, which also swing in front of their optics. The optical design of the system must, of course, provide physical space for these devices and motions.

[0072]As describe in detail below with embodiments of the present invention mirrors can be coated in space with important advantages...

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Abstract

A battery powered deposition system and process for applying aluminum, silver, and SiO films (and their derivatives such as aluminum oxide, aluminum nitride and silicon dioxide) especially for making broadband reflective coatings for mirrors. One or more filaments are wetted with a filament wetting material such as aluminum or a silver alloy. In a preferred embodiment filaments are heated quickly to a high temperature with an array of batteries and the filament wetting material is deposited as a reflective coating on the mirror.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of provisional application Ser. No. 62 / 388,546 filed 2016 Feb. 1, 2016.FIELD OF THE INVENTION[0002]The present invention relates to a new device and vacuum deposition processes to manufacture broadband reflective coatings for mirrors.BACKGROUND OF THE INVENTION[0003]Vacuum deposition refers to a family of processes used to deposit layers of material atom-by-atom or molecule-by-molecule on a solid surface. These processes operate at pressures at below atmospheric pressure (typically between 1×10−4 torr and 1×10−7 torr). The deposited layers can range from a thickness of one atom up to several microns. Multiple layers of different materials can be used to form protective coatings or optical interference coatings. Evaporation is a common method of thin-film deposition. Evaporation involves the heating of a source material, which evaporates and condenses on the target object (substrate). Performing the proc...

Claims

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Application Information

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IPC IPC(8): G02B5/08C23C14/56C03C17/36C23C14/08C22C5/06C23C14/14C23C14/24C25D7/08
CPCG02B5/0875C23C14/56C03C17/3647C25D7/08C22C5/06C23C14/14C23C14/24C23C14/081C03C17/09C03C17/36C03C17/3644C03C17/3663C03C2218/154C23C14/0021C23C14/26C22C21/00
Inventor SHEIKH, DAVID
Owner SHEIKH DAVID
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